Do not speak English at all, automatically, will be able to

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I want to ask ya, what if there are Indonesian people who do not speak English at all, to say nothing and do not know English at all when laid in America for 5 years if the auto was able to learn the English language without lag? For example: a genuine hobo plebeian who do not speak English at all if the lay inU.S. for 5 years whether Britain automatically speak fluently without having to learn English again after five years ? if the answer is yes, at least roughly how long can speak English fluently and without a hitch again (I made 5 years earlier as a benchmark wrote, so I ask again) same like we do not need to learn Indonesian can direct automatic, understand right?